GPU bottleneck?

[Yeltzin]

Hi!

 

Just want to ask what you guys think, is it the GPU that is the bottleneck, as i think or is it the CPU?

 

I have a i5 2550K@3,40 ghz processor, 16 GB ram, and a GTX560Ti (1024MB) videocard..

 

I run DCS a-10c with dual monitors and the total resolution is 3600x1200 with high settings.. I also use trackIR and saitek X52..

 

The game runs smooth while airborne, but realy lags when i taxi to the runway..

So it's more an annoying thing than a real problem, but if i know the bottleneck, i will try to overclock that component a bit..

 

Cheers!

[Heli Shed]

It's a specific tile issue. Those specs are fine.

 

'T'

[sobek]

With that resolution, it's most likely going to be your GPU.

[Kuky]

I am wondering this myself as in some situations neither CPU or GPU are running at it's 100% (for 4x core CPU this would be around 30% as sound and OS etc are using some cycles) and even if I overclock CPU bit more I see not increase in FPS.

 

So you can only try overclocking one then the other see if you get any difference in FPS then can draw conclusions if either helps

[Cali]

With that res, I'd say it's the GPU also. A 560TI 1Gb card running 3600x1200.

[SkateZilla]

560ti is your bottleneck.

 

580/570, 680/670, 7950/7970 are what you should be running for multiple screens.

 

The more VRAM the Better, as the frame buffer will need it.

 

The more physical shaders the better.

 

The 560ti's overclock nicely, and get comparible benchmarks.

 

but your still trying to Race V6 and V8's with a 4 Cyl.

[BIGNEWY]

It will be the airfields giving you issue's many of us suffer the same, hopefully they will optimise them when they get a chance.

 

I run a ATI Sapphire HD7850 OC 2GB over three screens @ 4460 x 900 and get slow down at airfields :)

[Yeltzin]

Thx for all the reply's.. so then it's the 560Ti that is to slow.. It's ok for gaming with a single monitor, but not dual..

 

:thumbup:

[SkateZilla]

But yeah, i get lower Fr/PS on Airbases too, so dont go buying a $500 card and expecting a magically smooth fr/ps...

[Megagoth1702]

Try monitoring your GPU load with some tools before you guess about bottlenecks.

 

I got a 6870. My GPU only maxes out in cities at ground level. I have my FPS locked at 30 so that's why often the GPU does not need to run at 100%. Only when there are a shit ton of objects around. Or if I am looking at a crazy battlefield with my TGP. :-/

 

But I can live with that, because only about 20% of the time I am actually disturbed by that. Not nearly enough reason to spend money on a new GPU.

[EtherealN]

Not necessarily that the 560 itself is slow, i would place RAM as the most likely culprit, specifically the amountof it and potentially the memory bus. I use that one fine with two screens, however i only run DCS on one of them. (Forum on the other of course.) On two screens i can however imagine that the framebuffer chokes the vRAM. Have not done a comparison test though.

[SkateZilla]

1GB of VRAm isnt enough to run above 1900x1200, at least no fluidly

[Kuky]

1GB of VRAm isnt enough to run above 1900x1200, at least no fluidly

I don't agree, I was running HD5870 that has 1GB vRAM for 2 years with good framerate and 4 monitors. The detail is that not all 4 monitors were rendering the game, 3 were used for exporting displays. So if the guy is using second monitor for exporting also 1GB vRAM is enough... faster card will of course give better performance but the issue is not low vRAM

[StoOopiD]

I had the same problem, uncheck the MIRRORS box.:) doing this almost doubled my frames

Edited December 25, 2012 by StoOopiD

[Heli Shed]

Dont chase the error guys.

 

We are where we are from endless 're-tiling'.

 

It is a tile issue. nothing to do with his sytem specs. even on one monitor, his FPS will increase for sure but will be retrospective due to the tile rendering for that specific area.

 

There are 28 known areas on my list that even if you had a PC powered by Nuclear Fission and a graphic card from the year 2015, the frame rate will still be retrospective in these areas.

 

In essence a Tile issue.

 

Happy Christmas.

 

'T'